Evaluation of Ion-Sputtered Molybdenum Disulfide Bearings for Spacecraft Gimbals
作者:
S.H. Loewenthal,
R.G. Chou,
G.B. Hopple,
W.L. Wenger,
期刊:
Tribology Transactions
(Taylor Available online 1994)
卷期:
Volume 37,
issue 3
页码: 505-515
ISSN:1040-2004
年代: 1994
DOI:10.1080/10402009408983323
出版商: Taylor & Francis Group
关键词: Bearings;Lubricants;Solid Film Lubricants;Rolling Bearings
数据来源: Taylor
摘要:
High-density, sputtered molybdenum disulfide films (MoS2) were investigated as lubricants for the next generation of spacecraft gimbal bearings where low torque signatures and long life are required. Low friction in a vacuum environment, virtually no out-gassing, insensitivity to low temperature, and radiation resistance of these lubricant films are valued in such applications. One hundred and twenty five thousand hours of accumulated bearing lest time were obtained on 24 pairs of flight-quality bearings ion-sputtered with three types of advanced MoS2films. Life tests were conducted in a vacuum over a simulated duty cycle for a space pay bad gimbal. Optimum retainer and ball material composition were investigated. Comparisons were made with test bearings lubricated with liquid space lubricants.
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